--- title: "Dräger Polytron Stationary Gas Detector System" description: "Explosion-proof stationary point gas alarm system engineered with pre-calibrated electrochemical DrägerSensors to monitor toxic H2S, O2 depletion, and CO concentrations in hazardous industrial zones." canonical_url: "https://nodewave.net/store/gas-detection/polytron-ec" last_updated: "2026-10-04T04:04:40.358Z" --- **Explosion-Proof Toxic & Oxygen Protection:** The Dräger Polytron Stationary Gas Detector combines heavy-duty **Class 1 Div 1 / Zone 1 flameproof housing** with intelligent plug-and-play electrochemical sensors. It provides continuous monitoring for lethal

H_2S

H 2 S , toxic

CO

C O , and critical

O_2

O 2 depletion without requiring housing disassembly during routine field calibration. ## Executive Summary & Core Capabilities The **Dräger Polytron Stationary Gas Detector System** is a field-proven stationary gas alarm engineered to monitor toxic gas concentration shifts and ambient oxygen levels in high-risk industrial plant environments. Housed in a heavy-duty copper-free aluminum or **316 stainless steel** explosion-proof enclosure, the unit protects personnel against dangerous toxic gas exposure or asphyxiation hazards near valves, pumps, storage vaults, and chemical reaction cells. At the center of the transmitter is Dräger's proprietary **electrochemical DrägerSensor® technology**. These pre-calibrated smart sensors carry internal EEPROM memory storing span calibration data, temperature matrix parameters, and gas response curves. This feature allows operators to swap pre-calibrated sensor heads directly in hazardous locations with zero field downtime. Non-Intrusive Field Calibration: Routine zero and span calibrations are conducted externally using magnetic wands through the glass window, preserving the flameproof seal in explosive atmospheres without opening the enclosure or requiring hot-work permits.

- **Pre-Calibrated Smart Sensors:** Sensors can be calibrated off-site in a laboratory and plugged into field units without requiring re-zeroing or complex field adjustments. - **Instant Toxic & Oxygen Alerts:** Rapid-response electrochemical cells trigger warning relays within seconds of

H_2S

H 2 S ,

CO

C O , or

O_2

O 2 deviations. - **Rugged All-Weather Housing:** Built with IP66/IP67 weatherproofing and chemical coatings to resist harsh marine salt spray, high humidity, and extreme industrial temperatures. - **SIL 2 Functional Safety:** Compliant with IEC 61508 safety standards for integration into automated Safety Instrumented Systems (SIS).

Operates on a **3-electrode potentiostatic sensor mechanism** where target gases (

H_2S

H 2 S ,

CO

C O ) diffuse through a liquid-tight membrane and undergo oxidation or reduction at the working electrode. This chemical reaction generates a micro-ampere current directly proportional to ambient gas concentration. Integrated temperature sensors dynamically correct outputs using internal polynomial algorithms, ensuring zero-point stability across temperature swings from **-40 °C to +65 °C**.

--- ## Technical Specifications & Performance Matrix

Metrology Parameter	Engineering Specification
Sensing Technique	Plug-and-Play Electrochemical DrägerSensor®
Hydrogen Sulfide ( $H_2S$ H 2 S ) Range	$0\text{ to }20 / 50 / 100\text{ ppm}$ 0 to 20/50/100 ppm (configurable)
Carbon Monoxide ( $CO$ C O ) Range	$0\text{ to }100 / 300 / 500\text{ ppm}$ 0 to 100/300/500 ppm (configurable)
Oxygen ( $O_2$ O 2 ) Range	$0\text{ to }25\%\text{ Vol}$ 0 to 25% Vol (depletion & enrichment)
Response Time ( $T_{90}$ T 90 )	$T_{90} < 15\text{ seconds}$ T 90 < 15 seconds ( $H_2S$ H 2 S ), $T_{90} < 20\text{ seconds}$ T 90 < 20 seconds ( $CO$ C O )
Long-Term Drift	$< \pm 1\%\text{ signal change/month}$ < ± 1% signal change/month

Interface Component	Technical Profile
Analog Signaling	$4\text{ to }20\text{ mA}$ 4 to 20 mA (2-wire or 3-wire operation)
Digital Fieldbus Options	HART 7, Modbus RTU RS485, Profibus PA
Internal Relays (Optional)	2 Alarm Relays, 1 Fault Relay (SPDT rated 5A @ 230 VAC)
Operating Voltage	$12\text{ to }30\text{ VDC}$ 12 to 30 VDC ( $24\text{ VDC}$ 24 VDC nominal)
Display Screen	Backlit graphical LCD screen with plain text pictograms

Compliance Metric	Specification
Housing Metallurgy	Epoxy-coated Copper-Free Aluminum or 316 Stainless Steel
Ingress Rating	IP66 / IP67 / NEMA 4X
Operating Temperature	$-40\text{ °C to }+65\text{ °C}$ − 40 °C to + 65 °C ( $-40\text{ °F to }+149\text{ °F}$ − 40 °F to + 149 °F )
Functional Safety	IEC 61508 SIL 2 certified
Explosion-Proof Approvals	ATEX / IECEx: Ex db IIC T6/T4 Gb; CSA Class 1 Div 1

--- ## Target Industry Applications Continuously tracks hazardous hydrogen sulfide leaks in oil refineries, wastewater sumps, and offshore desulfurization units. Monitors ambient air quality inside gas storage rooms, utility tunnels, and chemical plants to prevent asphyxiation and

CO

C O poisoning hazards. --- ## Official Provider Resources & In-Depth Documentation For complete technical handbooks, safety system integration guides, and direct support from Dräger's engineering team, explore the official manufacturer portals below: Access full product line specifications, ATEX/IECEx compliance certificates, and global support contacts directly from Dräger. Explore comprehensive sensor selection guides, gas cross-sensitivity charts, and technical datasheets for DrägerSensors.